php创建sprite_PHP教程

php
$srcdir='./image/';
$prefix="pic11_";
$dst="image";
$imagedir=scandir($srcdir);
array_shift($imagedir);
array_shift($imagedir);
$width=0;
$height=0;
foreach ($imagedir as $key => $value) {
 $picinfo=getimagesize($srcdir.$value);
 $width=$picinfo[0]+$width;
 if ($height  $height=$picinfo[1];
 }
}
$image=imagecreatetruecolor($width,$height);
imagesavealpha($image, true);
$color=imagecolorallocatealpha($image,0,0,0,127) ;
imagefill($image, 0, 0, $color);
$width=0;
$height=0;
$css="";
foreach ($imagedir as $key => $value) {
 $picinfo=getimagesize($srcdir.$value);
 $im=imagecreatefrompng($srcdir.$value);       //创建image
 imagecopymerge($image, $im, $width, 0, 0, 0, $picinfo[0], $picinfo[1],100);
 $picname=pathinfo($srcdir.$value);
 $css=".".$prefix.$picname['filename']."{height:".$picinfo[0]."px;width:".$picinfo[1]."px;background-position: -".$width."px 0px;}".$css;
 $width=$width+$picinfo[0];
 imagedestroy($im);             //销毁image
}
$css=$css."[class*=".$prefix."]{background-image:url('image.png');}}";
$css=$css.".".$prefix."{background-image:url('image.png');}";  //兼容ie 系列
file_put_contents("./".$dst.'.css',$css);
imagepng($image,"./".$dst.'.png');
imagedestroy($image);
?>